I think most of us, as humans procrastinate at one time or another. As you say you ensure that your work is getting done, I wouldn't stress about it too much.
Since you want to achieve more, you might consider what it is you want to achieve, and also why you want to achieve it, because something is making whatever ELSE your doing more pleasurable or important. Is there something unpleasant or Scary, or unduly difficult about your goal(s) that is causing this do you think?